This article implies small dioceses, with a family spirit,
           not huge dioceses run like an impersonal business:

"The extent of the diocese and the number of its inhabitants should generally be such that the bishop himself can officiate at pontifical functions, make pastoral visitations, faithfully direct and coordinate all the works of the apostolate in the diocese and know well especially his priests, and also the religious and lay people who are engaged in diocesan project"

Jesus, please help every diocese have a family spirit